银川市灰水足迹变化特征及其驱动因子分析

Design of clay core wall weathered dam considering the deteriorationof soft rock

由于水资源短缺及其衍生的水环境问题一直是区域经济社会发展和农业生态安全关注的关键问题。基于灰色水足迹的概念,本文在对银川市灰水足迹量化计算基础上,分析了2009—2018年区域灰水足迹的变化,进一步借助改进的STIRPAT模型,分析得到区域灰水足迹驱动因素的弹性系数,进一步直观反映驱动因子对灰水足迹的影响。研究表明:灰水足迹总体呈现波动变化的趋势,工业水足迹下降明显,农业水足迹较大;对灰水足迹影响较大的关键因素为:FDI、第一产业、第二产业、第三产业比重,其灰水足迹强度系数分别为:0.369、-0.751、-0.715、0.723、0.177。

Due to water resource shortages and related water environment issues,these remain key concerns for regional economic and social development as well as agricultural ecological security.Based on the concept of grey water footprint,this paper quantitatively calculates the grey water footprint of Yinchuan City and analyzes its changes from 2009 to 2018.Using an improved STIRPAT model,the elasticity coefficients of the driving factors for the regional grey water footprint were determined,providing a clearer view of how these factors influence the grey water footprint.The study reveals that:The grey water footprint shows a fluctuating trend overall,with a significant decrease in the industrial water footprint,while the agricultural water footprint remains relatively large.The key factors significantly impacting the grey water footprint are:FDI,the proportions of the primary,secondary,and tertiary industries,with their grey water footprint intensity coefficients being 0.369,-0.751,-0.715,0.723,and 0.177,respectively.